How can I tell whether I'm running a 32 or 64 bit kernel?

How can I tell whether I'm running a 32 or 64 bit kernel?



The command "isainfo" was provided for precisely that reason; 




64% isainfo -kv


64-bit sparcv9 kernel modules





32% isainfo -kv


32-bit sparc kernel modules





amd64% isainfo -kv


64-bit amd64 kernel modules


Solaris 2.6 and earlier releases are always 32 bit and lack the
"isainfo" command.




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